Pug syntax highlights edge cases

[CamilleDrapier]

• I have searched through existing issues
  • This seems related to: Completely renewed pug interpolations #1162 ; Syntax highlighting disabled after colon #2650 itself relates to Colon breaks syntax highlighting pugjs/pug#3309
• I have read through docs
• I have read FAQ
• I have tried restarting VS Code or running Vetur: Restart VLS

Info

• Platform: Linux
• Vetur version: v0.33.0
• VS Code version: 1.54.0

Problem

Some patterns seem to break the syntax highlight for the whole file (I'm using "Single File Components"), more specifically it appears that these cases are problematic (but still valid pug syntax):

• if the left-side of the affectation is alphabetical-only and the first word of the right-side is "type" and there are some other words afterwards.
  

• if the the left-side of the affectation is not alphabetical-only and there is no space before the closing )
  

• if the left-side of the affectation is not alphabetical-only and there is and affectation within ` ` and nothing else that would be delimited by a space
  

Reproducible Case

1. Call a simple component with a ... placehoder:

<template lang="pug">
  A(
    ...
  )
</template>

2. Replace ... by one of the following:

• a=type c=d
• a=type :c=d e=f
• @a=b) and remove the next/remaining )
• :a=b) and remove the next/remaining )
• :a=b :c=d) and remove the next/remaining )
• @test=`a = b`
• :test=`a = b`
• :test=`a = ${b}`
• :test=`a = b(c)`
• :test=`a = b;`
• :test=`a = b c = d`

3. You should be able to notice the problem.

4. Here are other similar examples that are currently working properly:

• a=b
• a=b)
• a="b" c="d"
• a="b" c=d
• :a)
• :a=b)
• :a=b )
• :a=b c=d)
• :a=b c)
• test=`a`
• test=`${a}`
• test=`a(b)`
• test=`a = b`
• test-test=`a = b`
• test_test=`a = b`
• :test=`a`
• :test=`${a}`
• :test=`a(b)`
• :test=`a == b`
• :test=`a === b`
• :test=`a = b `
• :test=`a = b c`

[yoyo930021]

https://github.com/vuejs/vetur/issues?q=is%3Aissue+is%3Aopen+pug

We don't have enough time to develop or maintenance pug part.
The PR is welcome. If anyone can help, There will be a lot of improvement.